Dolphin Community Bug Fixing

In my Dolphin Community Builder (Version 6) installation I get an constant error when clicking on an userID or UserPic to see the profile. The Error comes when clicking on the main page to as well as like when going from profile search page. The error is "The requested URL /(userid) was not found on this server. Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request. " An second problem is that the script shows in the search results also wrong profiles (when clicking "with pictures only" you see many profiles without pictures and so one)